Bedspring



H. L. LIEBERMAN Dec. 23, 1941.

BEDSPRING Filed May 3, 1940 ,v INVENTOR: HARRY z. IEBERMAN Patented Dec. 23, 1941 UNITED STATES PATENT OFFICE BEDSPRING Harry L. Lieberman, Chicago, Ill. Application Ma a, 1940, Serial No. 333,097

3 Claims.

This invention relates to improvements in'bedsprings and more particularly to an all-metal construction in which the spring members include a plurality of rows of integral and successive loops of similar size interposed between, the spaced apart upper and lower surfaces of the bedspring.

When the resilient members of a bedspring include coil springs inter-connected by helicals, there is always a certain amount of play which wears the finishing surface of the contacting parts during transportation and use, at times resulting in the parts becoming detached and also noisy inuse.

It is an object of this invention to provide a bedspring of simple and inexpensive construction in which the elements may be readily assembled and in which there are no loose parts to become detached or to rub against each other and become noisy.

Among the advantages of this improved construction are the longer life, lighter weight, greater resiliency, and the larger amount of fiat surface upon which the mattress rests than is usually found in bedsprings employing coil springs. Also, the edgesof this improved construction are supported upon resilient members throughout their extent, and the resilient members are so constructed in the event that any of the securing rivets become detached, there will be no sharp edges exposed which would tear-the spring cover or the mattress. Also, this invention provides a structure which is open and easily cleaned.

With these and other objects in view, reference is made to the accompanying sheet of drawings which illustrates a preferred form of this invention, with the understanding that detail changes may be made without departing from the scope thereof.

In the drawing:

Figure 1 is a top plan view of a preferred form of this invention with parts broken away and with parts removed, showing the underlying parts in plane view and in section.

Figure 2 is a fragmentary view in side elevation of one end of one of the longitudinal sides of the 'bedspring shown in Figure 1.

Figure 3 is a fragmentary view in elevation of one end of the bedspring where it joints the end of the longitudinal side shown in Figure 2.

Figure 4 is a fragmentary enlarged detail view in vertical section, taken on the line 44, Figure 1, looking in the direction of the arrows.

Figure 5 is a similar view taken on the line 5-5, Figure 1, looking in the direction of the arrows.

Figure 6 is a fragmentary enlarged detail view similar to Figure 5, illustrating a modified means of attaching the upper portions of the loops of the spring member to each other, showing the body of the strip in section, and also a modified means for joining the connected portions of the spring loops in spaced apart relation to the adjoining parallel series.

Figure 7 is a top plan view of the details shown in Figure 6. p

In accordance with this invention, the resilient members interposed between the top and bottom surfaces of the bedspring are formed by a plurality of narrow strips of spring metal I arranged in spaced apart relation parallel to each other and to the longitudinal sides of the bedspring, and which extend continuously from one end of the bedspring to the other. The resilient members are produced in each strip I by forming therein a plurality of successive circular loops 2 of the same diameter so constructed that the end portions and the body portions of the strips between the loops are in the same plane. It may be said that the loops 2 are formed depending from the same side of the strip .l, with the loops joining the body of the strip tangential to the plane of the strip so that the body of the strip I joining two contiguous loops will be in staggered relation to the body I joining the next two loops.

The opposite ends of each strip I are preferably secured upon the under side of strips 3, preferably of spring metal, forming the ends of the upper surface of the bedspring. The side members 4 of the bedspring are preferably formed of similar strips of spring metal connected at each corner by tangential arcuate metal strips 5 joined to the metal strips 3. The portions of the strip I between the contiguous loops 2 are held in spaced apart relation by a plurality of parallel cross members 6 preferably formed of spring metal connected to the upper side of the strips I by rivets I, and with the opposite ends secured upon the under side of the opposite side members 4 of the bedspring by rivets 8.

The bottom of the bedspring includes a frame 9 similar in shape to the upper surface of the bedspring, preferably of angle iron, which supports a plurality of longitudinal braces l0, preferably of angle iron, spaced apart under each strip Iin such a relation that the center of each depending loop 2 will rest thereon and be secured thereto by rivets I I.

It is preferable to secure the portions I and I of the strip I to each other where they depart from the plane of the strip to form. the loops 2 in spaced apart relation to prevent contact or rubbing by securing plates I2 upon the upper surface thereof by rivets I3 passing therethrough, so that one passes through each staggered portion. It is preferable to connect the staggered portions I and I of strip I secured to each other between plates I2 in each row in spaced apart relation to each other and to the side frames 4 by transverse strips I4 preferably of spring metal and of sufficient width to rest upon and cover the plates I2, the opposite ends of which are preferably secured to the under side of the side members by rivets I5. The strips I4 are secured to the plates I2 and the staggered portions I? a and l of the body of the strip- I thereunder by passing rivets I6 through the transverse strip I4 and oppositely disposed diagonal corners of the plate I2 to engage the staggered portions strip I, as shown in Figure 1.

It is preferable to provide a similar looped strip I between the end members 3, as well as between the side members 4 and bottom of the frame, as shown in Figures 2, '3 and 4. In securing the looped portions of the strip I to the side members 4 it is preferable to employ four rivets I'l passing members 6 may be formed of the same type of material as the clamps 20 and the edges thereof struck in, in a like manner to that shown in Figure 7, to form similar locking members 22 on opposite sides of the body I or I between the contiguous loops 2. In this latter construction, the rivets I, I3 and I6 may be dispensed with.

of the through the strip 4 with two rivets passing through each portion I and I of the loop as it departs from the body of the strip I. In this case, the plate I2 is dispensed with and the ends of the strips I4 are passed under the looped portions and the rivet I5 securing the end of the transverse strip I4 is passed between the looped portions I and I as they depart from the body of the strip to hold them in spaced apart relation. In securing the ends of the cross strips 6 to the side members 4, the free ends of the cross strips 6 are passed under the outermost portions of the strip I connecting the contiguous loops 2, and the rivets 8 are passed through the side member 4 and end of the cross strip 6 to one side of said portion adjacent the inner edge of the side member 4. The ends of the cross strips 6 are passed over the innermost portions of the body of strip I between contiguous loops and the free ends are riveted to the side member 4 adj acent its outer edge. In securing the looped pory tions of the strip I extending across the ends of verse end strip I, and free end of the longitudinal strip I.

While it is preferable to construct the strips I with the loops 2, cross members 6, connecting plates I2, and transverse strips I4, as well as the end members 3 and side members 4, of spring metal, if desired, the plates I2 may be formed of other metal so constructed as to form plates 20 extending on each side of the staggered portions I and I of the strips I and the ends 2! thereof crimped over the edges of the strips I and I with sufiicient force to maintain the. said portions in spaced apart relation, as shown in Figure 6. Likewise, if desired, the transverse strips I4 may be formed of similar material as the clamps 20 and the edges thereof be struck in over the ends of the plates I2, or turned in ends ZI of the clamping members 20. if employed, to form locking members 22 therefor, as shown in Figures 6 and 7. Also, if desired, the cross I9 passing through the end members 3, body of the trans- While in the preferred form of bedspring illustrated in Figure 1 the successive loops 2 formed in the spaced apart parallel strips I are arranged so that the loops are co-axial, however, if desired, the loops may be formed in staggered relation without departing from the scope of this invention. Likewise, while the centers of the loops in each strip I are equally spaced apart, the distances between loops may be varied. Also, the strip I may be provided with one or two pairs of loops at the ends of the strips adjacent the end members of the bedspring or the central portion of the strip may be looped and the portions of the strip I adjacent the end members of the bedspring may be continued in the same general plane.

What I claim is:

1. A bedspring construction including parallel upper and lower continuous frames of similar conformation, the edges of the upper frame formed of strips of thin resilient metal and the edges of the lower frame formed of strips of rigid metal or angle irons, said frames spaced apart from each other by a plurality of equally spaced apart strips of thin resilient metal, each strip coiled to form a series of similar equally spaced apart coils throughout, a plurality of rigid bracing members lying under the center line of each coiled strip secured at opposite ends to opposite rigid edges of the lower frame with the lower circular portion of each coil of the superimposed coiled strip supported by and secured to the bracing member thereunder, and a plurality of thin resilient metal connecting members lying above the coiled strips secured at opposite ends to opposite resilient edges of the upper frame with the .upper circular portion of each coil of the coiled strips secured to a connecting member.

2. The structure of claim 1 wherein one of the said strips of thin coiled resilient metal is interposed between the lower rigid and upper resilient .side members of the frame with the lower circular portions of each coil secured to the rigid side member and the upper circular portion of each coil secured to the under side of the resi ient side member.

3. The structure of claim 1 wherein one of the said strips, of thin coiled resilient metal is interposed between the lower rigid and upper resilient side members of the frame with the lower circular portions of each coil secured to the rigid side member and the upper circular portion of each coil secured to the under side of the resilient side member and wherein a similar strip of, thin coiled resilient metal is interposed b tween the lower rigid and upper resilient end members of the frame with the lower circular portion of each coil secured to the rigid end member and the upper circular portion of each coil secured to the under side of the resilient end member.

HARRY L. LIEBERMAN. 

